Sodium iodate

Structural formula
General
Surname	Sodium iodate
other names	Sodium iodate
Molecular formula	NaIO 3
Brief description	colorless and odorless solid
External identifiers / databases
CAS number 7681-55-2 17250-90-7 (pentahydrate) 22451-04-3 (monohydrate) EC number 231-672-5 ECHA InfoCard 100,028,793 PubChem 23675764 ChemSpider 22760 Wikidata Q411126
properties
Molar mass	197.89 g mol −1
Physical state	firmly
density	4.28 g cm −3
solubility	soluble in water (94.7 g l −1 at 25 ° C)
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 272-302-317-334 P: 220-261-280-342 + 311
Toxicological data	505 mg kg −1 ( LD 50 ,  mouse ,  oral )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Sodium iodate is a chemical compound (more precisely the sodium salt of iodic acid ) from the group of iodates . It is a light, air and moisture sensitive, colorless and odorless solid.

Occurrence

Of course, sodium iodate comes in some minerals and compounds e.g. B. as an admixture in Chile nitrate .

Extraction and presentation

Sodium iodate can be made by reacting a sodium- containing base such as sodium hydroxide with iodic acid :

${\displaystyle \mathrm {HIO_{3}+NaOH\longrightarrow NaIO_{3}+H_{2}O} }$

It is also possible to display it by reacting iodine with a hot sodium hydroxide solution:

${\displaystyle \mathrm {3\;I_{2}+6\;NaOH\longrightarrow NaIO_{3}+5\;NaI+3\;H_{2}O} }$

properties

Sodium iodate is an oxidizing agent . It crystallizes in the orthorhombic crystal system with the lattice parameters a = 5.75  Å , b = 6.37 Å and c = 4.05 Å. A monohydrate and a pentahydrate are known of the compound.

use

Sodium iodate is used as a preservative in the food industry and as an additive in iodized table salt .

See also

• Potassium iodate
• Sodium periodate NaIO ₄

Individual evidence

1. ↑ ^{a b c} data sheet Sodium iodate, ≥99% from Sigma-Aldrich , accessed on January 29, 2017 ( PDF ).
2. ↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Inorganic Compounds, pp. 4-90.
3. ↑ ^{a b} Entry on sodium iodate in the GESTIS substance database of the IFA , accessed on July 23, 2016(JavaScript required) .
4. ↑ I. Náray-Szabó, J. Neugebauer: "The Crystal Structure of Sodium Iodate" in J. Am. Chem. Soc. 1947 , 69 (6), pp. 1280-1283. doi : 10.1021 / ja01198a016
5. ↑ H. Miyamoto, M. Salomon: Alkali Metal Halates, Ammonium Iodate & Iodic Acid Solubility Data Series . Elsevier, 2013, ISBN 978-1-4832-8606-8 , pp. 330 ( limited preview in Google Book search).